Improvement in alloys for sheet metal



substances.

UNITED STATES PATENT OFFICE.

TIMOTHY DyJAOKSON, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN ALLOYS FOR SHEET METAL.

Specification forming part of Letters Patent No. 5,895, dated October 31, 1848.

To all whom it may concern:

Be it known that I, TIMOTHY D. JACKSON, of Brooklyn, in the county of Kings and State of New York, have discovered a 'new Alloy of Metals and Method of Compounding the Same for a Sheet Metal; and I do hereby declare the following to be a full, clear, and exact description of the materials employed by me in the said manufacture.

The nature of my invention consists inthe discovery of a method of compounding certain metals, and the forming of an alloy thereof possessing peculiar properties, and capable of being rolled into sheets and suitable for the manufacture of various articles of utility, susceptible of being cut with dies or worked in the stamping-machine. The peculiar properties referred to as contained in the discovery are great hardness combined with extreme ductility and strength and the articles to which I find this metal well adapted to the manufacture of, and to which I intend mainly to apply it, are bell-cranks and other like fittings used in the erection of hell machinery in dwelling-houses and like places. Beingled by much experience in this business to attemot the discovery of some material by which I should escape the difficulties and uncertainties of the previous modes, andin order to contrast the advantages obtained by my discover-y, which has been well attested, I shall state that I believe this is the first metal from ranges-such 'asin the fixtures of h otelsand the 1ike-require frequent lubrication with fatty This on the one hand attracts vermin of all sorts, and on the other causes frequent derangement of the operation of the bells by causing several cranks to adhere to each other when the fats used become corroded and thick, and I have known half a dozen bells to be rung by thepulling of a single.

position likewise requires no lubricating substances to be applied, from the fact of its containing a large dose of tin.

The materials employed by me in making this alloy and the manipulations in forming it are as follows: v 7

Take of copper, sixty-fourounces; zinc, twenty-two to twentysix ounces; india-tin, one to four ounces. The copper is then reduced in a crucible or melting-pot and the temperature carried to the highest point or points of ebullition. Then add the zinc, stir well, and bring the temperature up again as high as before. The tin is now to be added, stirring well, raise again the temperature, as before. Then pour off through a brush-broom into a tub of cold water. Singular as this last may seem, yet after repeated trials I have found it necessary.

Take the metal now and return to the meltingpot, reduce it once more, care being taken to keep it in a state of low fusion; then run it into pigs or bars suitable for the rolling-mill. This metal must be annealed each time it passes between the rollers. I

I do not claim alloying copper, zinc, and tin simply; but

I claimv The application of the manipulations em ployed for compounding an alloy of metals in the proportions and of the materials herein mentioned for a new sheet metal which shall be capable of being wrought in the cuttingpress with dies, 850., substantially as herein set forth and described.

TIMOTHY D. JACKSON.

Witnesses:

JOSEPH P. Prnsson, J. L. KINGSLEY. 

